Valve for air-compressors, &amp;c.



F. L. MILLER.

VALVE FOR AIR COMPRESSORS, 6w. APPLICATION FILED OCT. 18. I916.

1,280,663. Pmm'ease t. 24,1918.

INVENTOH UNITED STATES PATENT OFFICE.

FRANK L. MILLER, OF'I'ARKERSBURG, WEST VIRGINIA, ASSIGNOR T0 JAMES 'I'.CALLANAN, 0F PARKERSBURG, WEST VIRGINIA.

VALVE FOR AIR-COMPRESSORS, 8w.

Specification of Letters Patent.

Patented Sept. 24, 1918.

Application filed October 18, 1916. Serial No. 126,227. a

To all whom it may concern:

Be it known that I, FRANK L. MILLER, a citizen of the United States, andresident of Parkersburg, in the county of Wood and State of WestVirginia, have invented certain new and useful Improvements in Valvesfor Air-Compressors, &c., of which the following is a specification.

The object of this invention is to provide a simple and highly eflicientvalve for air compressors, vacuum pumps and like apparatus wherein thevalves inlet and outlet-open and close with hlgh frequency, beingnecessarily instantly responsive to the required movement, and whenclosed operating to seal the ported seat.

The invention is embodied in a valve having a marginal hinge, and afurther ob ect is to provide an eflicient and compact mounting for thehinge, together with novel means for regulating the tension thereof. Theinvention also includes, positive means of improved construction forlimiting the opening movement of the valve.

In the accompanying drawings, Figural is an elevation of a valve seatand valve embodying the invention. Fig. 2 is an elevation of the reverseface of the seat shown in Fig. 1. Fig. 3 is a sectional plan takenthrough the hinge on line 33 of Fig. 1, and Fig. 4: is a similar viewtaken on line 4.4 of Fig. 1. Fig. 5 is a vertical section of a portionof the valve seat and the valve, taken on line 5-5 of Fig. 1, the samebeing drawn to a larger scale. Fig. 6 is a detail view of the hinge boltand a portion of the valve hinge.

Referring to the drawings, A designates a seat-forming head ported at Bfor the passage of air, the ports being adapted to be closed at one faceof the seat by hinged valve 0. Head A is adapted to be secured in thewall of the cylinder of an air compressor, vacuum pump, or likeapparatus, being preferably mounted in the cylinder head, and as thearrangement in this regard is in accordance with usual practice, no portion of such cylinder or cylinder head is illustrated. The seat andvalve may be used interchangeably for controlling the inlet and outlet,the head being mounted to face the valve either inwardly or outwardlydepending on whether it is to perform inlet or outlet service.

Valve 0 is provided with a resilient hingeforming marginal portion D,and in the preferred adaptation the valve is formed of a piece ofrelatively thin sheet or plate metal, and resilient margin D is anintegral extension of the valvebody. Margin D is curled in barrel formas indicated at d, and the inner edge 41 thereof is deflected inwardlyin straight-edge formation to enter longitudinal groove 6 in hinge boltE, the latter provided at one end with head E slotted to receive ascrew-driver and at its opposite end upset as shown in Fig. 3 to confinethe bolt embracing head 6 which maintains the bolt and hinge assembled.

'For compactly mounting the hinged valve on the seat, the latter isformed with cavity F which .is preferably. open at" its ends throughopposite edges of head A, and at one side is open through thevalve-closed face of the seat, whereby the curled spring hinge and itsbolt may be entered in cavity F, with the valve body flatly engaging theface of the seat, as inFig. 5. Cavity F is substantially circular incross-section whereby the curled'hinge-forming marginal portion of thevalve may be tightened or loosened to vary its tension by turning bolt Ewith a screw-driver, the interlocking connection between the bolt andmarginal edge (5 causing the bolt when turned to increase or relax thetension, as will be understood. The bolt is held in the desired positionby set screw G, preferably of socket type entered in threaded cavity Gin seat A.

The opening movement of the valve is limited by the keeper H whichextends across the valve adjacent its hinged side, the keeper beingsecured to the seat at opposite sides of the valve by rivets H, therebylocking the valve in operative position, the keeper in addition tolimiting the opening move ment also prevents the lateral movementnecessary for sliding the spring hinge out I claim: 1. In a valve forcompressors, etc., the combination of a valve seat formed with a cavityopen through the *alve closed face thereof, a plate valve having one endformed into a coiled spring and mounted in said cavity for holding thevalve normally seated and ior opposing opening movement thereof.

2. In a valve for compressors, etc., the combination of a valve seatformed with a cavity which. is open through the valve closed facethereof, and a valve having a curled resilient marginal portion lyingwithin said cavity and comprising a spring hinge for holding the valvenormally closed and for opposing opening movement thereof. v

3. In a valve for compressors, ctc., the combination of a seat formedwith a cavity which is open through the valve closed face thereof, avalve having a curled resilient marginal portion lying within saidcavity and comprising a spring hinge for the valve, and an adjustabletension regulating device within said cavity and to which said marginalportion of the valve is secured.

4. In a valve for compressors, etc., the combination of a valve seathaving a cavity which is open through the valve closed face thereof, avalve having a curled resilient marginal portion lying within saidcavity and comprising a spring hinge, a hinge bolt within the cavity andembraced by said curled marginal portion and in engagement therewithwhereby the turning of the bolt is adapted to vary the tension of thespring, and means for securing the bolt in adjusted position.

In a valve for compressors, etc., the combination of a valve seat formedwith a cavity open through the valve closed face thereof, a valve havinga coiled end lying within said cavity, and a stop secured to the seatand overhanging the valve for limiting the opening movement of thelatter.

6. In a valve for compressors, etc, the combination of a valve seathaving a cavity open through the valve closed face thereof, a valvehaving a coiled end lying within said cavity, a rotatable boltoperatively secured to the hinge for holding the same under tension, anda set screw entered in the seat and adapted to engage said bolt forretaining the same in adjusted position.

7. In combination with a member forming a valve seat and having a cavitytherein opening toward the seat face of said memher, a bolt within saidcavity and extending longitudinally thereof and a plate valve having acoiled end extending through said opening and around said bolt and withits inner end secured to said bolt.

In testimony whereof I my signature in presence of two witnesses.

FRANK L. MILLER.

Witnesses J. T. CALLANAN, Jr., E. P. CRITES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

